MLBEDSW-11053: Set int16->int32 table for Ethos-U55 as unsupported
Add check to Ethos-U55 constraints to not support activation functions with an IFM of type Int16 and OFM type of Int32 as this is not supported by hardware.
Change-Id: I2230f07ba5f7c89dadefcddaab71a49f40138286 Signed-off-by: Henry Kent henry.kent@arm.com